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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">draw_ellipse_mod</span><span data-if="c" style="display:none;">T_draw_ellipse_mod</span><span data-if="cpp" style="display:none;">DrawEllipseMod</span><span data-if="dotnet" style="display:none;">DrawEllipseMod</span><span data-if="python" style="display:none;">draw_ellipse_mod</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">draw_ellipse_mod</span><span data-if="c" style="display:none;">T_draw_ellipse_mod</span><span data-if="cpp" style="display:none;">DrawEllipseMod</span><span data-if="dotnet" style="display:none;">DrawEllipseMod</span><span data-if="python" style="display:none;">draw_ellipse_mod</span></code> — Interactive drawing of an ellipse.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>draw_ellipse_mod</b>( :  : <a href="#WindowHandle"><i>WindowHandle</i></a>, <a href="#RowIn"><i>RowIn</i></a>, <a href="#ColumnIn"><i>ColumnIn</i></a>, <a href="#PhiIn"><i>PhiIn</i></a>, <a href="#Radius1In"><i>Radius1In</i></a>, <a href="#Radius2In"><i>Radius2In</i></a> : <a href="#Row"><i>Row</i></a>, <a href="#Column"><i>Column</i></a>, <a href="#Phi"><i>Phi</i></a>, <a href="#Radius1"><i>Radius1</i></a>, <a href="#Radius2"><i>Radius2</i></a>)</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>T_draw_ellipse_mod</b>(const Htuple <a href="#WindowHandle"><i>WindowHandle</i></a>, const Htuple <a href="#RowIn"><i>RowIn</i></a>, const Htuple <a href="#ColumnIn"><i>ColumnIn</i></a>, const Htuple <a href="#PhiIn"><i>PhiIn</i></a>, const Htuple <a href="#Radius1In"><i>Radius1In</i></a>, const Htuple <a href="#Radius2In"><i>Radius2In</i></a>, Htuple* <a href="#Row"><i>Row</i></a>, Htuple* <a href="#Column"><i>Column</i></a>, Htuple* <a href="#Phi"><i>Phi</i></a>, Htuple* <a href="#Radius1"><i>Radius1</i></a>, Htuple* <a href="#Radius2"><i>Radius2</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>DrawEllipseMod</b>(const HTuple&amp; <a href="#WindowHandle"><i>WindowHandle</i></a>, const HTuple&amp; <a href="#RowIn"><i>RowIn</i></a>, const HTuple&amp; <a href="#ColumnIn"><i>ColumnIn</i></a>, const HTuple&amp; <a href="#PhiIn"><i>PhiIn</i></a>, const HTuple&amp; <a href="#Radius1In"><i>Radius1In</i></a>, const HTuple&amp; <a href="#Radius2In"><i>Radius2In</i></a>, HTuple* <a href="#Row"><i>Row</i></a>, HTuple* <a href="#Column"><i>Column</i></a>, HTuple* <a href="#Phi"><i>Phi</i></a>, HTuple* <a href="#Radius1"><i>Radius1</i></a>, HTuple* <a href="#Radius2"><i>Radius2</i></a>)</code></p>
<p>
<code>void <a href="HWindow.html">HWindow</a>::<b>DrawEllipseMod</b>(double <a href="#RowIn"><i>RowIn</i></a>, double <a href="#ColumnIn"><i>ColumnIn</i></a>, double <a href="#PhiIn"><i>PhiIn</i></a>, double <a href="#Radius1In"><i>Radius1In</i></a>, double <a href="#Radius2In"><i>Radius2In</i></a>, double* <a href="#Row"><i>Row</i></a>, double* <a href="#Column"><i>Column</i></a>, double* <a href="#Phi"><i>Phi</i></a>, double* <a href="#Radius1"><i>Radius1</i></a>, double* <a href="#Radius2"><i>Radius2</i></a>) const</code></p>
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<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>DrawEllipseMod</b>(<a href="HTuple.html">HTuple</a> <a href="#WindowHandle"><i>windowHandle</i></a>, <a href="HTuple.html">HTuple</a> <a href="#RowIn"><i>rowIn</i></a>, <a href="HTuple.html">HTuple</a> <a href="#ColumnIn"><i>columnIn</i></a>, <a href="HTuple.html">HTuple</a> <a href="#PhiIn"><i>phiIn</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Radius1In"><i>radius1In</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Radius2In"><i>radius2In</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#Row"><i>row</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#Column"><i>column</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#Phi"><i>phi</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#Radius1"><i>radius1</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#Radius2"><i>radius2</i></a>)</code></p>
<p>
<code>void <a href="HWindow.html">HWindow</a>.<b>DrawEllipseMod</b>(double <a href="#RowIn"><i>rowIn</i></a>, double <a href="#ColumnIn"><i>columnIn</i></a>, double <a href="#PhiIn"><i>phiIn</i></a>, double <a href="#Radius1In"><i>radius1In</i></a>, double <a href="#Radius2In"><i>radius2In</i></a>, out double <a href="#Row"><i>row</i></a>, out double <a href="#Column"><i>column</i></a>, out double <a href="#Phi"><i>phi</i></a>, out double <a href="#Radius1"><i>radius1</i></a>, out double <a href="#Radius2"><i>radius2</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>draw_ellipse_mod</b>(<a href="#WindowHandle"><i>window_handle</i></a>: HHandle, <a href="#RowIn"><i>row_in</i></a>: float, <a href="#ColumnIn"><i>column_in</i></a>: float, <a href="#PhiIn"><i>phi_in</i></a>: float, <a href="#Radius1In"><i>radius_1in</i></a>: float, <a href="#Radius2In"><i>radius_2in</i></a>: float) -&gt; Tuple[float, float, float, float, float]</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">draw_ellipse_mod</span><span data-if="c" style="display:none">draw_ellipse_mod</span><span data-if="cpp" style="display:none">DrawEllipseMod</span><span data-if="com" style="display:none">DrawEllipseMod</span><span data-if="dotnet" style="display:none">DrawEllipseMod</span><span data-if="python" style="display:none">draw_ellipse_mod</span></code> returns the parameter for any orientated ellipse, which
has been created interactively by the user in the window.
</p>
<p>The created ellipse is described by its center, its two half axes and the angle
between the first half axis and the horizontal coordinate axis.
</p>
<p>To create an ellipse are expected the parameters <a href="#RowIn"><i><code><span data-if="hdevelop" style="display:inline">RowIn</span><span data-if="c" style="display:none">RowIn</span><span data-if="cpp" style="display:none">RowIn</span><span data-if="com" style="display:none">RowIn</span><span data-if="dotnet" style="display:none">rowIn</span><span data-if="python" style="display:none">row_in</span></code></i></a>,
<a href="#ColumnIn"><i><code><span data-if="hdevelop" style="display:inline">ColumnIn</span><span data-if="c" style="display:none">ColumnIn</span><span data-if="cpp" style="display:none">ColumnIn</span><span data-if="com" style="display:none">ColumnIn</span><span data-if="dotnet" style="display:none">columnIn</span><span data-if="python" style="display:none">column_in</span></code></i></a>,<a href="#PhiIn"><i><code><span data-if="hdevelop" style="display:inline">PhiIn</span><span data-if="c" style="display:none">PhiIn</span><span data-if="cpp" style="display:none">PhiIn</span><span data-if="com" style="display:none">PhiIn</span><span data-if="dotnet" style="display:none">phiIn</span><span data-if="python" style="display:none">phi_in</span></code></i></a>,<a href="#Radius1In"><i><code><span data-if="hdevelop" style="display:inline">Radius1In</span><span data-if="c" style="display:none">Radius1In</span><span data-if="cpp" style="display:none">Radius1In</span><span data-if="com" style="display:none">Radius1In</span><span data-if="dotnet" style="display:none">radius1In</span><span data-if="python" style="display:none">radius_1in</span></code></i></a>,<a href="#Radius2In"><i><code><span data-if="hdevelop" style="display:inline">Radius2In</span><span data-if="c" style="display:none">Radius2In</span><span data-if="cpp" style="display:none">Radius2In</span><span data-if="com" style="display:none">Radius2In</span><span data-if="dotnet" style="display:none">radius2In</span><span data-if="python" style="display:none">radius_2in</span></code></i></a>.
Keeping the button pressed determines the length (<a href="#Radius1"><i><code><span data-if="hdevelop" style="display:inline">Radius1</span><span data-if="c" style="display:none">Radius1</span><span data-if="cpp" style="display:none">Radius1</span><span data-if="com" style="display:none">Radius1</span><span data-if="dotnet" style="display:none">radius1</span><span data-if="python" style="display:none">radius_1</span></code></i></a>)
and the orientation (<a href="#Phi"><i><code><span data-if="hdevelop" style="display:inline">Phi</span><span data-if="c" style="display:none">Phi</span><span data-if="cpp" style="display:none">Phi</span><span data-if="com" style="display:none">Phi</span><span data-if="dotnet" style="display:none">phi</span><span data-if="python" style="display:none">phi</span></code></i></a>) of the first half axis.
In doing so a temporary default length for the second half axis is assumed, which may be
modified afterwards on demand.
After another mouse click in the center of the created ellipse you can move it.
A mouse click close to a vertex “grips” it to modify the length of the appropriate
half axis. You may modify the orientation only, if a vertex of the first half axis is
gripped.
</p>
<p>Pressing the right mouse button terminates the procedure.
After terminating the procedure the ellipse is not visible in the window any longer.</p>
<h2 id="sec_attention">注意</h2>
<p>If used in a buffer window, mouse events have to be supplied by the
application, while the draw operator must be run in another thread.</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="WindowHandle" class="parname"><b><code><span data-if="hdevelop" style="display:inline">WindowHandle</span><span data-if="c" style="display:none">WindowHandle</span><span data-if="cpp" style="display:none">WindowHandle</span><span data-if="com" style="display:none">WindowHandle</span><span data-if="dotnet" style="display:none">windowHandle</span><span data-if="python" style="display:none">window_handle</span></code></b> (input_control)  </span><span>window <code>→</code> <span data-if="dotnet" style="display:none"><a href="HWindow.html">HWindow</a>, </span><span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">HHandle</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (handle)</span><span data-if="dotnet" style="display:none"> (<i>IntPtr</i>)</span><span data-if="cpp" style="display:none"> (<i>HHandle</i>)</span><span data-if="c" style="display:none"> (<i>handle</i>)</span></span>
</div>
<p class="pardesc">Window handle.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="RowIn" class="parname"><b><code><span data-if="hdevelop" style="display:inline">RowIn</span><span data-if="c" style="display:none">RowIn</span><span data-if="cpp" style="display:none">RowIn</span><span data-if="com" style="display:none">RowIn</span><span data-if="dotnet" style="display:none">rowIn</span><span data-if="python" style="display:none">row_in</span></code></b> (input_control)  </span><span>ellipse.center.y <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Row index of the center.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="ColumnIn" class="parname"><b><code><span data-if="hdevelop" style="display:inline">ColumnIn</span><span data-if="c" style="display:none">ColumnIn</span><span data-if="cpp" style="display:none">ColumnIn</span><span data-if="com" style="display:none">ColumnIn</span><span data-if="dotnet" style="display:none">columnIn</span><span data-if="python" style="display:none">column_in</span></code></b> (input_control)  </span><span>ellipse.center.x <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Column index of the center.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="PhiIn" class="parname"><b><code><span data-if="hdevelop" style="display:inline">PhiIn</span><span data-if="c" style="display:none">PhiIn</span><span data-if="cpp" style="display:none">PhiIn</span><span data-if="com" style="display:none">PhiIn</span><span data-if="dotnet" style="display:none">phiIn</span><span data-if="python" style="display:none">phi_in</span></code></b> (input_control)  </span><span>ellipse.angle.rad <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Orientation of the bigger half axis in radians.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Radius1In" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Radius1In</span><span data-if="c" style="display:none">Radius1In</span><span data-if="cpp" style="display:none">Radius1In</span><span data-if="com" style="display:none">Radius1In</span><span data-if="dotnet" style="display:none">radius1In</span><span data-if="python" style="display:none">radius_1in</span></code></b> (input_control)  </span><span>ellipse.radius1 <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Bigger half axis.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Radius2In" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Radius2In</span><span data-if="c" style="display:none">Radius2In</span><span data-if="cpp" style="display:none">Radius2In</span><span data-if="com" style="display:none">Radius2In</span><span data-if="dotnet" style="display:none">radius2In</span><span data-if="python" style="display:none">radius_2in</span></code></b> (input_control)  </span><span>ellipse.radius2 <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Smaller half axis.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Row" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Row</span><span data-if="c" style="display:none">Row</span><span data-if="cpp" style="display:none">Row</span><span data-if="com" style="display:none">Row</span><span data-if="dotnet" style="display:none">row</span><span data-if="python" style="display:none">row</span></code></b> (output_control)  </span><span>ellipse.center.y <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Row index of the center.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Column" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Column</span><span data-if="c" style="display:none">Column</span><span data-if="cpp" style="display:none">Column</span><span data-if="com" style="display:none">Column</span><span data-if="dotnet" style="display:none">column</span><span data-if="python" style="display:none">column</span></code></b> (output_control)  </span><span>ellipse.center.x <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Column index of the center.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Phi" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Phi</span><span data-if="c" style="display:none">Phi</span><span data-if="cpp" style="display:none">Phi</span><span data-if="com" style="display:none">Phi</span><span data-if="dotnet" style="display:none">phi</span><span data-if="python" style="display:none">phi</span></code></b> (output_control)  </span><span>ellipse.angle.rad <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Orientation of the first half axis in radians.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Radius1" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Radius1</span><span data-if="c" style="display:none">Radius1</span><span data-if="cpp" style="display:none">Radius1</span><span data-if="com" style="display:none">Radius1</span><span data-if="dotnet" style="display:none">radius1</span><span data-if="python" style="display:none">radius_1</span></code></b> (output_control)  </span><span>ellipse.radius1 <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">First half axis.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Radius2" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Radius2</span><span data-if="c" style="display:none">Radius2</span><span data-if="cpp" style="display:none">Radius2</span><span data-if="com" style="display:none">Radius2</span><span data-if="dotnet" style="display:none">radius2</span><span data-if="python" style="display:none">radius_2</span></code></b> (output_control)  </span><span>ellipse.radius2 <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">float</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real)</span><span data-if="dotnet" style="display:none"> (<i>double</i>)</span><span data-if="cpp" style="display:none"> (<i>double</i>)</span><span data-if="c" style="display:none"> (<i>double</i>)</span></span>
</div>
<p class="pardesc">Second half axis.</p>
</div>
<div data-if="hdevelop" style="display:inline">
<h2 id="sec_example_hdevelop">例程 (HDevelop)</h2>
<pre class="example">
read_image(Image,'monkey')
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,\
                 Row,Column,Phi,Radius1,Radius2)
gen_ellipse(Ellipse,Row,Column,Phi,Radius1,Radius2)
reduce_domain(Image,Ellipse,GrayEllipse)
sobel_amp(GrayEllipse,Sobel,'sum_abs',3)
dev_display(Sobel)
</pre>
</div>
<div data-if="c" style="display:none">
<h2 id="sec_example_c">例程 (C)</h2>
<pre class="example">
read_image(&amp;Image,"monkey");
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,
                 &amp;Row,&amp;Column,&amp;Phi,&amp;Radius1,&amp;Radius2);
gen_ellipse(&amp;Ellipse,Row,Column,Phi,Radius1,Radius2);
reduce_domain(Image,Ellipse,&amp;GrayEllipse);
sobel_amp(GrayEllipse,&amp;Sobel,"sum_abs",3);
disp_image(Sobel,WindowHandle);
</pre>
</div>
<div data-if="cpp" style="display:none">
<h2 id="sec_example_cpp">例程 (HDevelop)</h2>
<pre class="example">
read_image(Image,'monkey')
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,\
                 Row,Column,Phi,Radius1,Radius2)
gen_ellipse(Ellipse,Row,Column,Phi,Radius1,Radius2)
reduce_domain(Image,Ellipse,GrayEllipse)
sobel_amp(GrayEllipse,Sobel,'sum_abs',3)
dev_display(Sobel)
</pre>
</div>
<div data-if="com" style="display:none">
<h2 id="sec_example_com">例程 (HDevelop)</h2>
<pre class="example">
read_image(Image,'monkey')
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,\
                 Row,Column,Phi,Radius1,Radius2)
gen_ellipse(Ellipse,Row,Column,Phi,Radius1,Radius2)
reduce_domain(Image,Ellipse,GrayEllipse)
sobel_amp(GrayEllipse,Sobel,'sum_abs',3)
dev_display(Sobel)
</pre>
</div>
<div data-if="dotnet" style="display:none">
<h2 id="sec_example_dotnet">例程 (HDevelop)</h2>
<pre class="example">
read_image(Image,'monkey')
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,\
                 Row,Column,Phi,Radius1,Radius2)
gen_ellipse(Ellipse,Row,Column,Phi,Radius1,Radius2)
reduce_domain(Image,Ellipse,GrayEllipse)
sobel_amp(GrayEllipse,Sobel,'sum_abs',3)
dev_display(Sobel)
</pre>
</div>
<h2 id="sec_result">结果</h2>
<p><code><span data-if="hdevelop" style="display:inline">draw_ellipse_mod</span><span data-if="c" style="display:none">draw_ellipse_mod</span><span data-if="cpp" style="display:none">DrawEllipseMod</span><span data-if="com" style="display:none">DrawEllipseMod</span><span data-if="dotnet" style="display:none">DrawEllipseMod</span><span data-if="python" style="display:none">draw_ellipse_mod</span></code> returns <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
    , if the window is valid and the
needed drawing mode (see <a href="set_insert.html"><code><span data-if="hdevelop" style="display:inline">set_insert</span><span data-if="c" style="display:none">set_insert</span><span data-if="cpp" style="display:none">SetInsert</span><span data-if="com" style="display:none">SetInsert</span><span data-if="dotnet" style="display:none">SetInsert</span><span data-if="python" style="display:none">set_insert</span></code></a>) is available.
如有必要，将引发异常。</p>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="open_window.html"><span data-if="hdevelop" style="display:inline">open_window</span><span data-if="c" style="display:none">open_window</span><span data-if="cpp" style="display:none">OpenWindow</span><span data-if="com" style="display:none">OpenWindow</span><span data-if="dotnet" style="display:none">OpenWindow</span><span data-if="python" style="display:none">open_window</span></a></code>
</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="reduce_domain.html"><span data-if="hdevelop" style="display:inline">reduce_domain</span><span data-if="c" style="display:none">reduce_domain</span><span data-if="cpp" style="display:none">ReduceDomain</span><span data-if="com" style="display:none">ReduceDomain</span><span data-if="dotnet" style="display:none">ReduceDomain</span><span data-if="python" style="display:none">reduce_domain</span></a></code>, 
<code><a href="disp_region.html"><span data-if="hdevelop" style="display:inline">disp_region</span><span data-if="c" style="display:none">disp_region</span><span data-if="cpp" style="display:none">DispRegion</span><span data-if="com" style="display:none">DispRegion</span><span data-if="dotnet" style="display:none">DispRegion</span><span data-if="python" style="display:none">disp_region</span></a></code>, 
<code><a href="set_colored.html"><span data-if="hdevelop" style="display:inline">set_colored</span><span data-if="c" style="display:none">set_colored</span><span data-if="cpp" style="display:none">SetColored</span><span data-if="com" style="display:none">SetColored</span><span data-if="dotnet" style="display:none">SetColored</span><span data-if="python" style="display:none">set_colored</span></a></code>, 
<code><a href="set_line_width.html"><span data-if="hdevelop" style="display:inline">set_line_width</span><span data-if="c" style="display:none">set_line_width</span><span data-if="cpp" style="display:none">SetLineWidth</span><span data-if="com" style="display:none">SetLineWidth</span><span data-if="dotnet" style="display:none">SetLineWidth</span><span data-if="python" style="display:none">set_line_width</span></a></code>, 
<code><a href="set_draw.html"><span data-if="hdevelop" style="display:inline">set_draw</span><span data-if="c" style="display:none">set_draw</span><span data-if="cpp" style="display:none">SetDraw</span><span data-if="com" style="display:none">SetDraw</span><span data-if="dotnet" style="display:none">SetDraw</span><span data-if="python" style="display:none">set_draw</span></a></code>, 
<code><a href="set_insert.html"><span data-if="hdevelop" style="display:inline">set_insert</span><span data-if="c" style="display:none">set_insert</span><span data-if="cpp" style="display:none">SetInsert</span><span data-if="com" style="display:none">SetInsert</span><span data-if="dotnet" style="display:none">SetInsert</span><span data-if="python" style="display:none">set_insert</span></a></code>
</p>
<h2 id="sec_alternatives">可替代算子</h2>
<p>
<code><a href="draw_ellipse.html"><span data-if="hdevelop" style="display:inline">draw_ellipse</span><span data-if="c" style="display:none">draw_ellipse</span><span data-if="cpp" style="display:none">DrawEllipse</span><span data-if="com" style="display:none">DrawEllipse</span><span data-if="dotnet" style="display:none">DrawEllipse</span><span data-if="python" style="display:none">draw_ellipse</span></a></code>, 
<code><a href="draw_circle.html"><span data-if="hdevelop" style="display:inline">draw_circle</span><span data-if="c" style="display:none">draw_circle</span><span data-if="cpp" style="display:none">DrawCircle</span><span data-if="com" style="display:none">DrawCircle</span><span data-if="dotnet" style="display:none">DrawCircle</span><span data-if="python" style="display:none">draw_circle</span></a></code>, 
<code><a href="draw_region.html"><span data-if="hdevelop" style="display:inline">draw_region</span><span data-if="c" style="display:none">draw_region</span><span data-if="cpp" style="display:none">DrawRegion</span><span data-if="com" style="display:none">DrawRegion</span><span data-if="dotnet" style="display:none">DrawRegion</span><span data-if="python" style="display:none">draw_region</span></a></code>
</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="gen_ellipse.html"><span data-if="hdevelop" style="display:inline">gen_ellipse</span><span data-if="c" style="display:none">gen_ellipse</span><span data-if="cpp" style="display:none">GenEllipse</span><span data-if="com" style="display:none">GenEllipse</span><span data-if="dotnet" style="display:none">GenEllipse</span><span data-if="python" style="display:none">gen_ellipse</span></a></code>, 
<code><a href="draw_rectangle1.html"><span data-if="hdevelop" style="display:inline">draw_rectangle1</span><span data-if="c" style="display:none">draw_rectangle1</span><span data-if="cpp" style="display:none">DrawRectangle1</span><span data-if="com" style="display:none">DrawRectangle1</span><span data-if="dotnet" style="display:none">DrawRectangle1</span><span data-if="python" style="display:none">draw_rectangle1</span></a></code>, 
<code><a href="draw_rectangle2.html"><span data-if="hdevelop" style="display:inline">draw_rectangle2</span><span data-if="c" style="display:none">draw_rectangle2</span><span data-if="cpp" style="display:none">DrawRectangle2</span><span data-if="com" style="display:none">DrawRectangle2</span><span data-if="dotnet" style="display:none">DrawRectangle2</span><span data-if="python" style="display:none">draw_rectangle2</span></a></code>, 
<code><a href="draw_polygon.html"><span data-if="hdevelop" style="display:inline">draw_polygon</span><span data-if="c" style="display:none">draw_polygon</span><span data-if="cpp" style="display:none">DrawPolygon</span><span data-if="com" style="display:none">DrawPolygon</span><span data-if="dotnet" style="display:none">DrawPolygon</span><span data-if="python" style="display:none">draw_polygon</span></a></code>, 
<code><a href="set_insert.html"><span data-if="hdevelop" style="display:inline">set_insert</span><span data-if="c" style="display:none">set_insert</span><span data-if="cpp" style="display:none">SetInsert</span><span data-if="com" style="display:none">SetInsert</span><span data-if="dotnet" style="display:none">SetInsert</span><span data-if="python" style="display:none">set_insert</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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